This study aims to evaluate the efficacy of lumbar support for low back pain prevention in rubber tapper. The investigators will randomized the participants(rubber tapper) into 2 groups;lumbar support and no support.The participant will be instructed for brace use. The sample size required are 200 subjects with 100 in each group. The subject will be evaluated every 3 month for the incidence of low back pain and quality of life after using the support.